| Methods Summary |
|---|
| private static void | checkIllegalFieldName(java.lang.String name)
if (name == null || name.equals(""))
illegal("Null or empty field name");
|
| public javax.management.Descriptor | clone()Returns a descriptor which is equal to this descriptor.
Changes to the returned descriptor will have no effect on this
descriptor, and vice versa.
This method returns the object on which it is called.
A subclass can override it
to return another object provided the contract is respected.
return this;
|
| public boolean | equals(java.lang.Object o)Compares this descriptor to the given object. The objects are equal if
the given object is also a Descriptor, and if the two Descriptors have
the same field names (possibly differing in case) and the same
associated values. The respective values for a field in the two
Descriptors are equal if the following conditions hold:
- If one value is null then the other must be too.
- If one value is a primitive array then the other must be a primitive
array of the same type with the same elements.
- If one value is an object array then the other must be too and
{@link Arrays#deepEquals(Object[],Object[])} must return true.
- Otherwise {@link Object#equals(Object)} must return true.
if (o == this)
return true;
if (!(o instanceof Descriptor))
return false;
String[] onames;
if (o instanceof ImmutableDescriptor) {
onames = ((ImmutableDescriptor) o).names;
} else {
onames = ((Descriptor) o).getFieldNames();
Arrays.sort(onames, String.CASE_INSENSITIVE_ORDER);
}
if (names.length != onames.length)
return false;
for (int i = 0; i < names.length; i++) {
if (!names[i].equalsIgnoreCase(onames[i]))
return false;
}
Object[] ovalues;
if (o instanceof ImmutableDescriptor)
ovalues = ((ImmutableDescriptor) o).values;
else
ovalues = ((Descriptor) o).getFieldValues(onames);
return Arrays.deepEquals(values, ovalues);
|
| private int | fieldIndex(java.lang.String name)
return Arrays.binarySearch(names, name, String.CASE_INSENSITIVE_ORDER);
|
| private static int | findNonEmpty(javax.management.Descriptor[] ds, int start)
for (int i = start; i < ds.length; i++) {
if (!isEmpty(ds[i]))
return i;
}
return -1;
|
| public final java.lang.String[] | getFieldNames()
return names.clone();
|
| public final java.lang.Object | getFieldValue(java.lang.String fieldName)
checkIllegalFieldName(fieldName);
int i = fieldIndex(fieldName);
if (i < 0)
return null;
Object v = values[i];
if (v == null || !v.getClass().isArray())
return v;
if (v instanceof Object[])
return ((Object[]) v).clone();
// clone the primitive array, could use an 8-way if/else here
int len = Array.getLength(v);
Object a = Array.newInstance(v.getClass().getComponentType(), len);
System.arraycopy(v, 0, a, 0, len);
return a;
|
| public final java.lang.Object[] | getFieldValues(java.lang.String fieldNames)
if (fieldNames == null)
return values.clone();
Object[] result = new Object[fieldNames.length];
for (int i = 0; i < fieldNames.length; i++) {
String name = fieldNames[i];
if (name != null && !name.equals(""))
result[i] = getFieldValue(name);
}
return result;
|
| public final java.lang.String[] | getFields()
String[] result = new String[names.length];
for (int i = 0; i < result.length; i++) {
Object value = values[i];
if (value == null)
value = "";
else if (!(value instanceof String))
value = "(" + value + ")";
result[i] = names[i] + "=" + value;
}
return result;
|
| public int | hashCode()Returns the hash code value for this descriptor. The hash
code is computed as the sum of the hash codes for each field in
the descriptor. The hash code of a field with name {@code n}
and value {@code v} is {@code n.toLowerCase().hashCode() ^ h}.
Here {@code h} is the hash code of {@code v}, computed as
follows:
- If {@code v} is null then {@code h} is 0.
- If {@code v} is a primitive array then {@code h} is computed using
the appropriate overloading of {@code java.util.Arrays.hashCode}.
- If {@code v} is an object array then {@code h} is computed using
{@link Arrays#deepHashCode(Object[])}.
- Otherwise {@code h} is {@code v.hashCode()}.
if (hashCode == -1) {
int hash = 0;
for (int i = 0; i < names.length; i++) {
Object v = values[i];
int h;
if (v == null)
h = 0;
else if (v instanceof Object[])
h = Arrays.deepHashCode((Object[]) v);
else if (v.getClass().isArray()) {
h = Arrays.deepHashCode(new Object[] {v}) - 31;
// hashcode of a list containing just v is
// v.hashCode() + 31, see List.hashCode()
} else
h = v.hashCode();
hash += names[i].toLowerCase().hashCode() ^ h;
}
hashCode = hash;
}
return hashCode;
|
| private static void | illegal(java.lang.String message)
IllegalArgumentException iae = new IllegalArgumentException(message);
throw new RuntimeOperationsException(iae);
|
| private static boolean | isEmpty(javax.management.Descriptor d)
if (d == null)
return true;
else if (d instanceof ImmutableDescriptor)
return ((ImmutableDescriptor) d).names.length == 0;
else
return (d.getFieldNames().length == 0);
|
| public boolean | isValid()Returns true if all of the fields have legal values given their
names. This method always returns true, but a subclass can
override it to return false when appropriate.
return true;
|
| private static java.util.SortedMap | makeMap(java.lang.String[] fieldNames, java.lang.Object[] fieldValues)
if (fieldNames == null || fieldValues == null)
throw new IllegalArgumentException("Null array parameter");
if (fieldNames.length != fieldValues.length)
throw new IllegalArgumentException("Different size arrays");
SortedMap<String, Object> map =
new TreeMap<String, Object>(String.CASE_INSENSITIVE_ORDER);
for (int i = 0; i < fieldNames.length; i++) {
String name = fieldNames[i];
if (name == null || name.equals(""))
throw new IllegalArgumentException("Empty or null field name");
Object old = map.put(name, fieldValues[i]);
if (old != null) {
throw new IllegalArgumentException("Duplicate field name: " +
name);
}
}
return map;
|
| private static java.util.SortedMap | makeMap(java.lang.String[] fields)
if (fields == null)
throw new IllegalArgumentException("Null fields parameter");
String[] fieldNames = new String[fields.length];
String[] fieldValues = new String[fields.length];
for (int i = 0; i < fields.length; i++) {
String field = fields[i];
int eq = field.indexOf('=");
if (eq < 0) {
throw new IllegalArgumentException("Missing = character: " +
field);
}
fieldNames[i] = field.substring(0, eq);
// makeMap will catch the case where the name is empty
fieldValues[i] = field.substring(eq + 1);
}
return makeMap(fieldNames, fieldValues);
|
| static javax.management.Descriptor | nonNullDescriptor(javax.management.Descriptor d)
if (d == null)
return EMPTY_DESCRIPTOR;
else
return d;
|
| private java.lang.Object | readResolve()This method can replace a deserialized instance of this
class with another instance. For example, it might replace
a deserialized empty ImmutableDescriptor with
{@link #EMPTY_DESCRIPTOR}.
if (names.length == 0 && getClass() == ImmutableDescriptor.class)
return EMPTY_DESCRIPTOR;
boolean bad = false;
if (names == null || values == null || names.length != values.length)
bad = true;
if (!bad) {
final Comparator<String> compare = String.CASE_INSENSITIVE_ORDER;
String lastName = ""; // also catches illegal null name
for (int i = 0; i < names.length; i++) {
if (names[i] == null ||
compare.compare(lastName, names[i]) >= 0) {
bad = true;
break;
}
lastName = names[i];
}
}
if (bad)
throw new InvalidObjectException("Bad names or values");
return this;
|
| public final void | removeField(java.lang.String fieldName)Removes a field from the descriptor.
if (fieldName != null && fieldIndex(fieldName) >= 0)
unsupported();
|
| public final void | setField(java.lang.String fieldName, java.lang.Object fieldValue)This operation is unsupported since this class is immutable. If
this call would change a mutable descriptor with the same contents,
then a {@link RuntimeOperationsException} wrapping an
{@link UnsupportedOperationException} is thrown. Otherwise,
the behavior is the same as it would be for a mutable descriptor:
either an exception is thrown because of illegal parameters, or
there is no effect.
checkIllegalFieldName(fieldName);
int i = fieldIndex(fieldName);
if (i < 0)
unsupported();
Object value = values[i];
if ((value == null) ?
(fieldValue != null) :
!value.equals(fieldValue))
unsupported();
|
| public final void | setFields(java.lang.String[] fieldNames, java.lang.Object[] fieldValues)This operation is unsupported since this class is immutable. If
this call would change a mutable descriptor with the same contents,
then a {@link RuntimeOperationsException} wrapping an
{@link UnsupportedOperationException} is thrown. Otherwise,
the behavior is the same as it would be for a mutable descriptor:
either an exception is thrown because of illegal parameters, or
there is no effect.
if (fieldNames == null || fieldValues == null)
illegal("Null argument");
if (fieldNames.length != fieldValues.length)
illegal("Different array sizes");
for (int i = 0; i < fieldNames.length; i++)
checkIllegalFieldName(fieldNames[i]);
for (int i = 0; i < fieldNames.length; i++)
setField(fieldNames[i], fieldValues[i]);
|
| public java.lang.String | toString()
StringBuilder sb = new StringBuilder("{");
for (int i = 0; i < names.length; i++) {
if (i > 0)
sb.append(", ");
sb.append(names[i]).append("=");
Object v = values[i];
if (v != null && v.getClass().isArray()) {
String s = Arrays.deepToString(new Object[] {v});
s = s.substring(1, s.length() - 1); // remove [...]
v = s;
}
sb.append(String.valueOf(v));
}
return sb.append("}").toString();
|
| public static javax.management.ImmutableDescriptor | union(javax.management.Descriptor descriptors)Return an {@code ImmutableDescriptor} whose contents are the union of
the given descriptors. Every field name that appears in any of
the descriptors will appear in the result with the
value that it has when the method is called. Subsequent changes
to any of the descriptors do not affect the ImmutableDescriptor
returned here.
In the simplest case, there is only one descriptor and the
returned {@code ImmutableDescriptor} is a copy of its fields at the
time this method is called:
Descriptor d = something();
ImmutableDescriptor copy = ImmutableDescriptor.union(d);
// Optimize the case where exactly one Descriptor is non-Empty
// and it is immutable - we can just return it.
int index = findNonEmpty(descriptors, 0);
if (index < 0)
return EMPTY_DESCRIPTOR;
if (descriptors[index] instanceof ImmutableDescriptor
&& findNonEmpty(descriptors, index + 1) < 0)
return (ImmutableDescriptor) descriptors[index];
Map<String, Object> map =
new TreeMap<String, Object>(String.CASE_INSENSITIVE_ORDER);
ImmutableDescriptor biggestImmutable = EMPTY_DESCRIPTOR;
for (Descriptor d : descriptors) {
if (d != null) {
String[] names;
if (d instanceof ImmutableDescriptor) {
ImmutableDescriptor id = (ImmutableDescriptor) d;
names = id.names;
if (id.getClass() == ImmutableDescriptor.class
&& names.length > biggestImmutable.names.length)
biggestImmutable = id;
} else
names = d.getFieldNames();
for (String n : names) {
Object v = d.getFieldValue(n);
Object old = map.put(n, v);
if (old != null) {
boolean equal;
if (old.getClass().isArray()) {
equal = Arrays.deepEquals(new Object[] {old},
new Object[] {v});
} else
equal = old.equals(v);
if (!equal) {
final String msg =
"Inconsistent values for descriptor field " +
n + ": " + old + " :: " + v;
throw new IllegalArgumentException(msg);
}
}
}
}
}
if (biggestImmutable.names.length == map.size())
return biggestImmutable;
return new ImmutableDescriptor(map);
|
| private static void | unsupported()
UnsupportedOperationException uoe =
new UnsupportedOperationException("Descriptor is read-only");
throw new RuntimeOperationsException(uoe);
|
